/*
 *  Copyright (C) 2001,2002 Constantin Kaplinsky.  All Rights Reserved.
 *
 *  This is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This software is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this software; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 *  USA.
 */

/*
 * cursor.c - code to support cursor shape updates (XCursor and
 * RichCursor preudo-encodings).
 */

#include <rfb/rfbclient.h>


#define OPER_SAVE     0
#define OPER_RESTORE  1

#define RGB24_TO_PIXEL(bpp,r,g,b)                                       \
   ((((uint##bpp##_t)(r) & 0xFF) * client->format.redMax + 127) / 255             \
    << client->format.redShift |                                              \
    (((uint##bpp##_t)(g) & 0xFF) * client->format.greenMax + 127) / 255           \
    << client->format.greenShift |                                            \
    (((uint##bpp##_t)(b) & 0xFF) * client->format.blueMax + 127) / 255            \
    << client->format.blueShift)


rfbBool HandleCursorShape( rfbClient* client
                         , int xhot, int yhot
                         , int width, int height
                         , uint32_t enc )
{ int bytesPerPixel;
  size_t bytesPerRow, bytesMaskData;
  rfbXCursorColors * rgb;
  uint32_t colors[2];
  char *buf;
  uint8_t *ptr;
  int x, y, b;

  bytesPerPixel = client->format.bitsPerPixel / 8;
  bytesPerRow = (width + 7) / 8;
  bytesMaskData = bytesPerRow * height;

  if (width * height == 0)
    return TRUE;

  /* Allocate memory for pixel data and temporary mask data. */
  FREE( client->rcSource);

  client->rcSource = malloc(width * height * bytesPerPixel);
  if (client->rcSource == NULL)
    return FALSE;

  /* Read and decode cursor pixel data, depending on the encoding type. */

  if (enc == rfbEncodingXCursor)  /* Read and convert background and foreground colors. */
  { rgb= (rfbXCursorColors*)getStreamBytes( client, sz_rfbXCursorColors );

    if ( !rgb )
    { FREE( client->rcSource );
      return FALSE;
    }
    colors[0] = RGB24_TO_PIXEL(32, rgb->backRed, rgb->backGreen, rgb->backBlue);
    colors[1] = RGB24_TO_PIXEL(32, rgb->foreRed, rgb->foreGreen, rgb->foreBlue);

    /* Read 1bpp pixel data into a temporary buffer. */
    buf= (char*)getStreamBytes( client, bytesMaskData );

    if ( !buf )
    { FREE( client->rcSource );
      return FALSE;
    }

    /* Convert 1bpp data to byte-wide color indices. */
    ptr = client->rcSource;
    for (y = 0; y < height; y++)
    { for (x = 0; x < width / 8; x++)
      { for (b = 7; b >= 0; b--)
        { *ptr = buf[y * bytesPerRow + x] >> b & 1;
        	  ptr += bytesPerPixel;
     	} }

      for (b = 7; b > 7 - width % 8; b--)
      { *ptr = buf[y * bytesPerRow + x] >> b & 1;
       	ptr += bytesPerPixel;
    } }

    /* Convert indices into the actual pixel values. */
    switch (bytesPerPixel) {
    case 1:
      for (x = 0; x < width * height; x++)
	client->rcSource[x] = (uint8_t)colors[client->rcSource[x]];
      break;
    case 2:
      for (x = 0; x < width * height; x++)
	((uint16_t *)client->rcSource)[x] = (uint16_t)colors[client->rcSource[x * 2]];
      break;
    case 4:
      for (x = 0; x < width * height; x++)
	((uint32_t *)client->rcSource)[x] = colors[client->rcSource[x * 4]];
      break;
    }

  }
  else  	/* enc == rfbEncodingRichCursor */
  { if (!ReadFromRFBServer(client, (char *)client->rcSource, width * height * bytesPerPixel))
    {
      FREE(client->rcSource);

//      fr ee(buf);
      return FALSE;
  }  }

  /* Read and decode mask data. */

  if (!ReadFromRFBServer(client, buf, bytesMaskData))
  { FREE( client->rcSource );
    return FALSE;
  }

  client->rcMask = malloc(width * height);

  if (client->rcMask == NULL)
  { FREE( client->rcSource );
//    fr ee(buf);
    return FALSE;
  }

  ptr = client->rcMask;

  for (y = 0; y < height; y++)
  { for (x = 0; x < width / 8; x++)
    { for (b = 7; b >= 0; b--)
      { *ptr++ = buf[y * bytesPerRow + x] >> b & 1;
    } }
    for (b = 7; b > 7 - width % 8; b--)
    { *ptr++ = buf[y * bytesPerRow + x] >> b & 1;
  } }

  if ( client->GotCursorShape )
  { client->GotCursorShape(client, xhot, yhot, width, height, bytesPerPixel);
  }

//  fr ee(buf);

  return TRUE;
}


